Update Location = 247
I did some looking in the save game file. The following is my largest army copied from the save game file. Note the location for the leader is 247 and the army is 385:
landunit = {
id = { type = 4712 id = 5446461 }
name = "Northumberland Fusiliers"
location = 385
date = { year = 1504 month = december day = 12 }
development = no
morale = 5.320
historicalleader = {
id = { type = 6 id = 52407 }
name = "Henry VII"
category = monarch
location = 247
rank = 0
fire = 3
shock = 3
movement = 4
startdate = { year = 1485 month = august day = 22 }
deathdate = { year = 1509 month = april day = 21 }
}
inf = 134947.000
cav = 16375.000
art = 11.000
}
Then I tried Khephren's suggestion of making a army in 247 different sizes compared to the one in 385 with the following results (note the tests were done by going through the list once then going back and trying them again - in other words I did not do the same test twice in a row):
247 at 30,000 versus 385 at 50,000 - leader goes to Terra Incognita
247 at 50,000 versus 385 at 135,000 - leader goes to 385
247 at 50,000 versus 385 at 135,000 - leader goes to Terra Incognita
247 at 55,000 versus 385 at 135,000 - leader goes to Terra Incognita
247 at 60,000 versus 385 at 135,000 - leader goes to Terra Incognita
247 at 60,000 versus 385 at 135,000 - leader goes to Terra Incognita (again)
247 at 75,000 versus 385 at 135,000 - leader goes to to 247
247 at 75,000 versus 385 at 135,000 - leader goes to to 247 (again)
247 at 100,000 versus 385 at 135,000 - leader goes to 247.
247 at 100,000 versus 385 at 135,000 - leader goes to 247 (again)
247 at 200,000 versus 385 at 135,000 - leader goes to 247
Edit - when the leader went to terra incognita it was being assigned to a army on a ship of 122,000